Updates as of May 10, 2026
Suspected source of explosion
The outbreak likely originated from contaminated rodent waste during a shore excursion in Argentina, with the ship en route to Tenerife in Spain’s Canary Islands for inspection.
Case fatality rates for hantavirus infections
According to the latest WHO update, Hantavirus infections are associated with a mortality rate of <1-15% in Asia and Europe and up to 50% in the Americas.
Cases in America, Europe, Asia
In 2025, in the Region of the Americas, eight countries reported 229 cases and 59 deaths with a CFR of 25.7%. In the European Region, 1,885 hantavirus infections were reported in 2023 (0.4 per 100,000), marking the lowest rate observed between 2019 and 2023.
In East Asia, particularly China and the Republic of Korea, hantavirus hemorrhagic fever with renal syndrome (HFRS) continues to account for thousands of cases annually, although the incidence has declined in recent decades.
Human-to-human transmission
Human Hantavirus infection is primarily acquired through contact with the urine, feces, or saliva of infected rodents or by touching contaminated surfaces.





